Google translation: "According to the German purity law, only those clarifiers are approved, acting purely absorptive and must be completely removed. These include (not animal) silica gels and PVPP. Other clarifying agent, such as they can be registered abroad, e.g. animal fining agents such as Isinglass fining agents such as acting or enzymatically papain or clarifiers are chemically active, and in Germany under the Purity law does not apply. Since all of our beers are brewed to the Reinheitsgebot, is it is purely vegan products.
The Franziskaner brewery, of course, used in the labeling of Returnable bottles casein glue, like most breweries! Synthetic glued labels are difficult or not at all easily removable and make the ecological aspects of reusable bottles does not make sense."